Maharashtra BoardEnglish MediumSTD 9ScienceAcids, Bases and Salts2 Marks
Question
Blue coloured copper sulphate crystals become colourless on heating.
✓
Answer
- Copper sulphate crystals are blue in colour and crystalline in form due to presence of water of crystallisation. - Each molecule of crystalline copper sulphate contains five molecules of water of crystallisation ( $\left.CuSO _4 \cdot 5 H _2 O \right)$. - On heating, the copper sulphate crystals lose the water of crystallisation and turns into white amorphous powder called as anhydrous copper sulphate. - Therefore, blue coloured copper sulphate crystals become colourless on heating.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.